The dashboard used chunking of numbers to enhance working memory.
The dashboard avoid grid lines encouraging to be focus for the viewer and thus enhancing pre-attention process.
The used of histogram to desxribe the trend of Covid-19 cases across the continents is appropriate.
The used of appropriate color and contrast to describe the total cases of Covid-19 cases across the globe is noticable.
Adding meaning (National flag of each country) in the dashboard helped enhancing the long term memory of the viewer and make it more recognizable.